Introduces the group E^ws_TA(A,B) of weakly split extensions in topological Abelian groups, gives descriptions as continuous sum structures on B×A and as a cocycle quotient Z_c/B_c, relates it to ordinary extensions via a six-term exact sequence, and supplies examples for discrete groups with Bohr t
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For the given chemotaxis model, uniform persistence holds when m ≥ 1; the positive equilibrium is linearly stable for χ0 below a parameter-dependent threshold χ*(u*) and unstable above it, with exponential convergence under stated conditions.
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Weak split extensions of topological Abelian groups
Introduces the group E^ws_TA(A,B) of weakly split extensions in topological Abelian groups, gives descriptions as continuous sum structures on B×A and as a cocycle quotient Z_c/B_c, relates it to ordinary extensions via a six-term exact sequence, and supplies examples for discrete groups with Bohr t
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Chemotaxis models with signal-dependent sensitivity and a logistic-type source, II: Persistence and stabilization
For the given chemotaxis model, uniform persistence holds when m ≥ 1; the positive equilibrium is linearly stable for χ0 below a parameter-dependent threshold χ*(u*) and unstable above it, with exponential convergence under stated conditions.